6d617269-6e65-696e-666f-000000009043 UTF-8 Department of Biology biologia@ua.pt 2026-04-27T00:00:00+02:00 EPSG:4326 Megafauna composition in Aurora seamount and hydrothermal vent field (High Arctic) identified during the 'HACON expedition 2019' with the RV Kronprins Haakon (cruise no. 2019708) 2026-03-30 Creation 2026-03-30 Publication 6d617269-6e65-696e-666f-000000009043 The Aurora seamount and hydrothermal field, located in the western Gakkel Ridge of the Central Arctic Ocean, was first identified in 2001. The dataset presented here was collected during the HACON19 research cruise onboard of the RV Kronprins Haakon, as part the international HACON project (Hot vents in an ice-covered ocean: the role of the Arctic as a connectivity pathway between ocean basins). This campaign used the Ocean Floor Observation and Bathymetry System (OFOBS), which is a towed underwater sled equipped with high-resolution still and video cameras. This dataset provides density data (individuals per square meter) for benthic megafauna (organisms greater than 2 cm) inhabiting the Aurora Seamount, its hydrothermal vent field, and surrounding areas. The data were collected between October 1 and October 15, 2019. In addition to the biological density measurements, the dataset includes environmental context information such as observation depth and substrate type. Sampling methods:Observations were identified based on still image frames collected along several exploratory transects, and captured by a towed camera system (Ocean Floor Observation and Bathymetry System – OFOBS), which was equipped with both a high-resolution still camera and a high-definition video camera.Method step description:Each still image was annotated using the online annotation platform BIIGLE (Langenkämper et al., 2017; https://biigle.de) for the identification and quantification of all living benthic megafauna organisms (-gt;2cm), seafloor substrate type, and description of any other seafloor characteristics. Acknowledgements:AURORA: Bringing Deep-Sea Biodiversity Data to Light. Funded through the DTO-BioFlow project, which is supported by the European Union (Grant Agreement No. 101112823). HACON project - Hot vents in an ice-covered ocean: the role of the Arctic as a connectivity pathway between ocean basins, funded by FRINATEK call in the FRIPRO programme of the Research Council of Norway and coordinated by NIVA. Data creators are also funded by national funds through FCT – Fundação para a Ciência e a Tecnologia I.P., under the project CESAM-Centro de Estudos do Ambiente e do Mar, references UID/50017/2025 (doi.org/10.54499/UID/50017/2025) and LA/P/0094/2020 (doi.org/10.54499/LA/P/0094/2020). Department of Biology biologia@ua.pt Department of Biology biologia@ua.pt Norwegian Institute for Water Research niva@niva.no Department of Biology biologia@ua.pt Department of Biology biologia@ua.pt Department of Biology biologia@ua.pt Bio-geographical regions Habitats and biotopes Sea regions GEMET - INSPIRE themes, version 1.0 2008-06-01 Publication Local Spatial scope 2019-05-22 publication Attribution (CC BY) Ramalho S, Hilário A, Santos J, Araújo S M, Ramirez-Llodra E, Matos F L (2026). Megafauna composition in Aurora seamount and hydrothermal vent field (High Arctic) identified during the 'HACON expedition 2019' with the RV Kronprins Haakon (cruise no. 2019708). Flanders Marine Institute. There are no limitations on public access to spatial data sets and services. Tabular no linguistic content; not applicable biota environment geoscientificInformation oceans -6.30201786 -5.90336007 82.8930692 82.90522246 2019-10-01 2019-10-07 XYZ ASCII https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/6d617269-6e65-696e-666f-000000009043 online information about the resource https://emodnet.ec.europa.eu/geoviewer/?layers=6d617269-6e65-696e-666f-000000001510:1:1-basemap=ebwbl-active=12639-bounds=-12530604,-7655416,12530604,7655416-filters=12639:datasetid__datasetid=9043---projection=EPSG:3857 online instructions for transferring data from one storage device or system to another https://www.eurobis.org/toolbox/en/download/occurrence/dataset/9043 online instructions for transferring data from one storage device or system to another https://www.gbif.org/dataset/29d135e1-35c7-4f64-9362-02118df6bcdc online instructions for transferring data from one storage device or system to another https://geo.vliz.be/geoserver/Dataportal/wfs?service=wfs-version=1.1.0-typeName=eurobis-obisenv_full-request=GetFeature-outputFormat=text%2Fcsv-viewParams=datasetid%3A9043 OGC Web Feature Service Download Service INSPIRE Download Service (WFS) https://geo.vliz.be/geoserver/wms?service=WMS-request=getCapabilities-layer=Dataportal:eurobis_rasters-obisenv OGC Web Map Service View Service INSPIRE WMS http://ipt.vliz.be/eurobis/archive.do?r=aurora_megafauna_2019 online instructions for transferring data from one storage device or system to another http://ipt.vliz.be/eurobis/resource?r=aurora_megafauna_2019 online instructions for transferring data from one storage device or system to another https://obis.org/dataset/ec6a83ca-31d1-4351-832d-f429e145bb8a online instructions for transferring data from one storage device or system to another Technical Guidance for the implementation of INSPIRE dataset and service metadata based on ISO/TS 19139:2007 2017-03-02 Publication This metadata set is non conformant with the Technical Guidance for the implementation of INSPIRE dataset and service metadata based on ISO/TS 19139:2007 false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Publication Conformance of this data set with the INSPIRE Implementing Rules for the interoperability of spatial data sets and services was not evaluated Prior to publication data undergo quality control checked which are described in https://github.com/EMODnet/EMODnetBiocheck?tab=readme-ov-file#understanding-the-output